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Natural Monuments

Periglacial Deposits (Raised Beach)

Natural Monuments

Periglacial Deposits (Raised Beach)

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Periglacial Deposits (Raised Beach)

Recommended by 13 hikers out of 14

This Highlight is in a protected area

Please check local regulations for: Cornwall National Landscape

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Location: Illogan, South West England, England, United Kingdom

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3. Basset's Cove – Basset's Cove loop from Portreath

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Tips

Jonathan Harjes & Melissa Schwarz

January 9, 2022

GB: These deposits are the youngest, with a maximum of 3 million years (Quaternary period). The unsorted layers with the large rounded rock fragments date back to the last great ice age, when Cornwall was a tundra area. In this permafrost area, existing rocks were cracked open by frost. Then the environmental temperatures increased so that the ground thawed and began to flow. The thawed soil with the rock fragments was finally deposited together with loess (fine sediment blown in by the wind).
The melting of the glaciers removed a large load from the continent, causing it to rise (effect of isostasy) and the periglacial deposits which were originally de-posited at sea level can now be found several meters on top of the cliffs. These deposits are also called raised beaches.

EN: These deposits are the youngest at a maximum of 3 million years old (Quaternary age). The unsorted layers with the large rounded rock fragments date back to the last great ice age, when Cornwall was a tundra area. In this permafrost area, existing rocks were broken open by frost. The ambient temperatures then rose, causing the ground to thaw and begin to flow. The thawed soil with the rock fragments was finally deposited together with loess (fine sediment blown in by the wind).
The melting of the glaciers removed a large load from the continent, causing it to rise (effect of isostasy) and the periglacial deposits originally deposited at sea level can now be found several meters above this level. In English, these deposits are also called raised beaches.

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Elevation 110 m

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Monday 17 November

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Max wind speed: 7.0 km/h

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Location: Illogan, South West England, England, United Kingdom

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Periglacial Deposits (Raised Beach)

1. Godrevy Lighthouse – Hell's Mouth Cliffs loop from Phillack

2. Basset's Cove – Basset's Cove loop from Portreath

3. Basset's Cove – Basset's Cove loop from Portreath

Other Popular Places to Check Out

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